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[PATCH v4 1/8] THP: Use real address for NUMA policy

To: linux-mm@kvack.org
Subject: [PATCH v4 1/8] THP: Use real address for NUMA policy
From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Date: Mon, 20 Aug 2012 16:52:30 +0300
Cc: Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>, x86@kernel.org, Andi Kleen <ak@linux.intel.com>, "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>, Tim Chen <tim.c.chen@linux.intel.com>, Alex Shi <alex.shu@intel.com>, Jan Beulich <jbeulich@novell.com>, Robert Richter <robert.richter@amd.com>, Andy Lutomirski <luto@amacapital.net>, Andrew Morton <akpm@linux-foundation.org>, Andrea Arcangeli <aarcange@redhat.com>, Johannes Weiner <hannes@cmpxchg.org>, Hugh Dickins <hughd@google.com>, KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>, Mel Gorman <mgorman@suse.de>, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-mips@linux-mips.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org
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From: Andi Kleen <ak@linux.intel.com>

Use the fault address, not the rounded down hpage address for NUMA
policy purposes. In some circumstances this can give more exact
NUMA policy.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
---
 mm/huge_memory.c |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 57c4b93..70737ec 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -681,11 +681,11 @@ static inline gfp_t alloc_hugepage_gfpmask(int defrag, 
gfp_t extra_gfp)
 
 static inline struct page *alloc_hugepage_vma(int defrag,
                                              struct vm_area_struct *vma,
-                                             unsigned long haddr, int nd,
+                                             unsigned long address, int nd,
                                              gfp_t extra_gfp)
 {
        return alloc_pages_vma(alloc_hugepage_gfpmask(defrag, extra_gfp),
-                              HPAGE_PMD_ORDER, vma, haddr, nd);
+                              HPAGE_PMD_ORDER, vma, address, nd);
 }
 
 #ifndef CONFIG_NUMA
@@ -710,7 +710,7 @@ int do_huge_pmd_anonymous_page(struct mm_struct *mm, struct 
vm_area_struct *vma,
                if (unlikely(khugepaged_enter(vma)))
                        return VM_FAULT_OOM;
                page = alloc_hugepage_vma(transparent_hugepage_defrag(vma),
-                                         vma, haddr, numa_node_id(), 0);
+                                         vma, address, numa_node_id(), 0);
                if (unlikely(!page)) {
                        count_vm_event(THP_FAULT_FALLBACK);
                        goto out;
@@ -944,7 +944,7 @@ int do_huge_pmd_wp_page(struct mm_struct *mm, struct 
vm_area_struct *vma,
        if (transparent_hugepage_enabled(vma) &&
            !transparent_hugepage_debug_cow())
                new_page = alloc_hugepage_vma(transparent_hugepage_defrag(vma),
-                                             vma, haddr, numa_node_id(), 0);
+                                             vma, address, numa_node_id(), 0);
        else
                new_page = NULL;
 
-- 
1.7.7.6


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